W. F. Beegle

Proteins of the periodontium. Identification of collagens with the [alpha1(I)]2alpha2 and [alpha1(III)]3 structures in bovine periodontal ligament.

H. Birkedal‐Hansen, W. Butler, R. E. Taylor, 1975, The Journal of biological chemistry.

The Phosphoprotein of Rabbit Incisors

W. S. Richardson, W. Butler, E. Munksgaard, 1977 .